CN108486430B - Production process of high-strength heat-conducting oil tank aluminum alloy plate - Google Patents
Production process of high-strength heat-conducting oil tank aluminum alloy plate Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 140
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000007670 refining Methods 0.000 claims abstract description 100
- 238000005098 hot rolling Methods 0.000 claims abstract description 35
- 238000003723 Smelting Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 23
- 238000005097 cold rolling Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 55
- 229910052782 aluminium Inorganic materials 0.000 claims description 52
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 52
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 44
- 238000000137 annealing Methods 0.000 claims description 44
- 238000001816 cooling Methods 0.000 claims description 44
- 238000005096 rolling process Methods 0.000 claims description 33
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 20
- 230000007547 defect Effects 0.000 claims description 12
- -1 aluminum-titanium-boron Chemical compound 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 11
- 229910052796 boron Inorganic materials 0.000 abstract description 10
- 229910052719 titanium Inorganic materials 0.000 abstract description 10
- 239000000956 alloy Substances 0.000 abstract description 7
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 229910052727 yttrium Inorganic materials 0.000 abstract description 6
- 239000013078 crystal Substances 0.000 abstract description 3
- 239000002828 fuel tank Substances 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000001953 recrystallisation Methods 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 description 18
- 238000003756 stirring Methods 0.000 description 9
- 229910052684 Cerium Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 229910052702 rhenium Inorganic materials 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Fuel Cell (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a production process of an aluminum alloy plate of a high-strength heat-conducting oil tank, which comprises the following steps: (1) preparing materials: the materials are prepared according to the following mass percentage: si is more than or equal to 0.8 percent and less than or equal to 1.0 percent, Mg is less than or equal to 0.2 percent, Cu is more than or equal to 0.1 percent and less than or equal to 0.5 percent, Fe is less than or equal to 0.5 percent, Mn is less than or equal to 0.1 percent, Zn is less than or equal to 0.5 percent, Sn is less than or equal to 0.2 percent, Re is less than or equal to 0.0075 percent, B is more than or equal to 0.1 percent and less than or equal to 0.15 percent, Ti is less than or equal to 0.1 percent and less than or equal to 0.15 percent, Sr is more than or equal to 0.04 percent and less than or equal to 0.06 percent, Ce; (2) smelting; (3) refining; (4) casting; (5) hot rolling; (6) cold rolling; (7) obtaining a finished product; according to the invention, multiple alloy elements such as B, Ti, Y, Ce, Pm, Sr and the like are added to refine crystal grains, change the recrystallization state, improve the impact resistance of the alloy, effectively improve the strength and toughness of the aluminum alloy plate, improve the heat conductivity coefficient of the aluminum alloy when the Re is added, improve the heat conductivity of the aluminum alloy plate, improve the heat conductivity and high temperature resistance, have high heat dissipation strength, and are used for manufacturing automobile fuel tanks and durable in use.
Description
Technical Field
The invention relates to the technical field of aluminum alloy materials, in particular to a production process of a high-strength heat-conducting oil tank aluminum alloy plate.
Background
The aluminum alloy plate is an industrial building material, is used in various industries according to different materials, can be divided into two types of non-painting products and painting products according to a surface treatment mode, and the used industries comprise airplane structures, rivets, missile structures, truck hubs and the like.
Although aluminum alloys have the advantages of good formability, good plasticity, high strength, etc., their impact resistance and thermal conductivity are still to be improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-strength heat-conducting oil tank aluminum alloy plate production process capable of producing an aluminum alloy plate for an oil tank, which has good heat conductivity and high strength.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: si is more than or equal to 0.8 percent and less than or equal to 1.0 percent, Mg is less than or equal to 0.2 percent, Cu is more than or equal to 0.1 percent and less than or equal to 0.5 percent, Fe is less than or equal to 0.5 percent, Mn is less than or equal to 0.1 percent, Zn is less than or equal to 0.5 percent, Sn is less than or equal to 0.2 percent, Re is less than or equal to 0.0075 percent, B is more than or equal to 0.1 percent and less than or equal to 0.15 percent, Ti is less than or equal to 0.1 percent and less than or equal to 0.15 percent, Sr is more than or equal to 0.04 percent and less than or equal to 0.06 percent, Ce;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 730-;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.2-1.5kg/mm, the refining temperature is 715-725 ℃, the refining time is 20-30min, and standing for 20-30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 420-620mm, performing blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180-class 220 ℃ at the speed of 70-80 ℃/h, preserving heat for 7-8h, heating to 300-class 320 ℃ at the speed of 60-70 ℃/h, preserving heat for 5-10h, heating to 400-class 450 ℃ at the speed of 80-90 ℃/h, preserving heat for 3-5h, cooling to 230-class 300 ℃ at the speed of 70-90 ℃/h, preserving heat for 10-15h, heating to 400-class 450 ℃ at the speed of 40-60 ℃/h, preserving heat for 5-10h, cooling to 180-class 200 ℃ at the speed of 100-class 150 ℃/h, preserving heat for 4-6h, and finally air cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2-3 hours, reducing the temperature to 450 ℃ in the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 6-8mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 1.5-3.5mm at the rolling speed of 120-600 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, annealing at the furnace gas temperature of 130-.
The invention has the beneficial effects that: according to the invention, multiple alloy elements such as B, Ti, Y, Ce, Pm, Sr and the like are added to refine crystal grains, change the recrystallization state, improve the impact resistance of the alloy, effectively improve the strength and toughness of the aluminum alloy plate, improve the heat conductivity coefficient of the aluminum alloy when the Re is added, improve the heat conductivity of the aluminum alloy plate, improve the heat conductivity and high temperature resistance, have high heat dissipation strength, and are used for manufacturing automobile fuel tanks and durable in use.
Detailed Description
In order to provide a further understanding and appreciation for the structural features and advantages achieved by the present invention, the following detailed description of the preferred embodiments is provided:
example 1:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9% of Si, 0.2% of Mg, 0.3% of Cu, 0.3% of Fe, 0.1% of Mn0.5% of Zn, 0.2% of Sn, 0.0025% of Re, 0.1% of B, 0.05% of Ti, 0.1% of Sr, 0.04% of Y, 0.03% of Ce, 0.02% of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
Example 2:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9 percent of Si, 0.2 percent of Mg, 0.3 percent of Cu, 0.3 percent of Fe, 0.1 percent of Mn0.5 percent of Zn, 0.2 percent of Sn, 0.005 percent of Re, 0.1 percent of B, 0.075 percent of Ti, 0.125 percent of Sr, 0.05 percent of Y, 0.04 percent of Ce, 0.025 percent of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
Example 3:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9% of Si, 0.2% of Mg, 0.3% of Cu, 0.3% of Fe, 0.1% of Mn0.5%, 0.5% of Zn, 0.2% of Sn, 0.0075% of Re, 0.1% of B, 0.1% of Ti, 0.15% of Sr, 0.06% of Y, 0.05% of Ce, 0.03% of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
Example 4:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9% of Si, 0.2% of Mg, 0.3% of Cu, 0.3% of Fe, 0.1% of Mn0.5% of Zn, 0.2% of Sn, 0.0025% of Re, 0.125% of B, 0.05% of Ti, 0.1% of Sr, 0.04% of Y, 0.03% of Ce, 0.02% of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
Example 5:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9% of Si, 0.2% of Mg, 0.3% of Cu, 0.3% of Fe, 0.1% of Mn0.5% of Zn, 0.2% of Sn, 0.005% of Re, 0.125% of B, 0.075% of Ti, 0.15% of Sr, 0.05% of Y, 0.05% of Ce, 0.03% of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
Example 6:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9% of Si, 0.2% of Mg, 0.3% of Cu, 0.3% of Fe, 0.1% of Mn0.5%, 0.5% of Zn, 0.2% of Sn, 0.0075% of Re, 0.125% of B, 0.1% of Ti, 0.125% of Sr, 0.06% of Y, 0.04% of Ce, 0.025% of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
Example 7:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9% of Si, 0.2% of Mg, 0.3% of Cu, 0.3% of Fe, 0.1% of Mn0.5% of Zn, 0.2% of Sn, 0.0025% of Re, 0.15% of B, 0.05% of Ti, 0.1% of Sr, 0.04% of Y, 0.03% of Ce, 0.02% of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
Example 8:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9 percent of Si, 0.2 percent of Mg, 0.3 percent of Cu, 0.3 percent of Fe, 0.1 percent of Mn0.5 percent of Zn, 0.2 percent of Sn, 0.005 percent of Re, 0.15 percent of B, 0.075 percent of Ti, 0.15 percent of Sr, 0.05 percent of Y, 0.04 percent of Ce, 0.03 percent of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
Example 9:
the production process of the high-strength heat-conducting oil tank aluminum alloy plate comprises the following steps:
(1) preparing materials: the materials are prepared according to the following mass percentage: 0.9% of Si, 0.2% of Mg, 0.3% of Cu, 0.3% of Fe, 0.1% of Mn0.5% of Zn, 0.2% of Sn, 0.0075% of Re, 0.15% of B, 0.1% of Ti, 0.15% of Sr, 0.06% of Y, 0.05% of Ce, 0.03% of Pm and the balance of Al;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 750 ℃ for smelting, and stirring after all the aluminum alloy raw material is smelted;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.5kg/mm, the refining temperature is 720 ℃, the refining time is 30min, and standing for 30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt through a foamed ceramic filter plate with the aperture of 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot with the thickness of 600mm, carrying out blundering on the surface of the ingot after homogenizing annealing to remove surface defects, wherein the annealing conditions are as follows: heating to 180 ℃ at the speed of 70 ℃/h, preserving heat for 7h, heating to 300 ℃ at the speed of 60 ℃/h, preserving heat for 5h, heating to 400 ℃ at the speed of 80 ℃/h, preserving heat for 3h, cooling to 230 ℃ at the speed of 70 ℃/h, preserving heat for 10h, heating to 400 ℃ at the speed of 40 ℃/h, preserving heat for 5h, cooling to 180 ℃ at the speed of 100 ℃/h, preserving heat for 4h, and finally air-cooling to room temperature;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2 hours, reducing the temperature to 450 ℃ within the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate with the thickness of 7mm, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and then rolling into a cold-rolled aluminum coil with the thickness of 3mm at the rolling speed of 300 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, carrying out low-temperature annealing at the furnace gas temperature of 200 ℃ for 12h, cutting the returned aluminum coil, and cutting the aluminum coil into plates.
The experimental results are as follows:
(1) the thermal conductivity of the aluminum alloy increases along with the increase of the addition of Re, the thermal conductivity of the aluminum alloy decreases along with the increase of B, Ti, but the influence of B, Ti on the thermal conductivity is smaller than that of Re on the thermal conductivity of the aluminum alloy;
(2) the yield strength and the tensile strength of the aluminum alloy increase with the increase of B, Ti content, the elongation of the aluminum alloy decreases with the increase of B, Ti content, and the influence of B, Ti on the yield strength, the tensile strength and the elongation of the aluminum alloy is larger than the influence of the content of Y, Ce and Pm on the aluminum alloy;
(3) according to the experimental result, the 5 th group of aluminum alloy has high strength and good thermal conductivity.
According to the invention, multiple alloy elements such as B, Ti, Y, Ce, Pm, Sr and the like are added to refine crystal grains, change the recrystallization state, improve the impact resistance of the alloy, effectively improve the strength and toughness of the aluminum alloy plate, improve the heat conductivity coefficient of the aluminum alloy when the Re is added, improve the heat conductivity of the aluminum alloy plate, improve the heat conductivity and high temperature resistance, have high heat dissipation strength, and are used for manufacturing automobile fuel tanks and durable in use.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The production process of the high-strength heat-conducting oil tank aluminum alloy plate is characterized by comprising the following steps of:
(1) preparing materials: the materials are prepared according to the following mass percentage: si is more than or equal to 0.8 percent and less than or equal to 1.0 percent, Mg is less than or equal to 0.2 percent, Cu is more than or equal to 0.1 percent and less than or equal to 0.5 percent, Fe is less than or equal to 0.5 percent, Mn is less than or equal to 0.1 percent, Zn is less than or equal to 0.5 percent, Sn is less than or equal to 0.2 percent, Re is less than or equal to 0.0075 percent, B is more than or equal to 0.1 percent and less than or equal to 0.15 percent, Ti is less than or equal to 0.1 percent and less than or equal to 0.15 percent, Sr is more than or equal to 0.04 percent and less than or equal to 0.06 percent, Ce;
(2) smelting: placing the prepared aluminum alloy raw material into a smelting furnace at the temperature of 730-;
(3) refining: pouring the smelted aluminum alloy melt into a refining furnace for refining, spraying refining agent powder into 2/3 deep in the aluminum alloy melt by taking nitrogen as a carrier for refining, wherein the nitrogen pressure is 1.2-1.5kg/mm, the refining temperature is 715-725 ℃, the refining time is 20-30min, and standing for 20-30min after refining is finished;
(4) casting: filtering the refined aluminum alloy melt by a foamed ceramic filter plate with the aperture being more than or equal to 30ppi to remove oxides and slag inclusion, adding an aluminum-titanium-boron wire for refining, casting the refined aluminum alloy melt into an aluminum alloy ingot, and performing blundering on the surface of the ingot after homogenizing annealing to remove surface defects;
(5) hot rolling: heating the aluminum alloy ingot to 500 ℃ and preserving heat for 2-3 hours, reducing the temperature to 450 ℃ in the time interval for preserving heat, then discharging and rolling into an aluminum alloy plate, wherein the hot rolling finishing temperature is 300 ℃;
(6) cold rolling: cooling the blank obtained by hot rolling to room temperature, and rolling into a cold-rolled aluminum coil at the rolling speed of 120-600 m/min;
(7) and (3) finished product: cleaning the cold-rolled aluminum coil, putting the cold-rolled aluminum coil into an annealing furnace, annealing at the furnace gas temperature of 130-.
2. The production process of the high-strength heat-conducting oil tank aluminum alloy plate as claimed in claim 1, wherein the annealing conditions in the step (4) are as follows: heating to 180-class 220 ℃ at the speed of 70-80 ℃/h, preserving heat for 7-8h, heating to 300-class 320 ℃ at the speed of 60-70 ℃/h, preserving heat for 5-10h, heating to 400-class 450 ℃ at the speed of 80-90 ℃/h, preserving heat for 3-5h, cooling to 230-class 300 ℃ at the speed of 70-90 ℃/h, preserving heat for 10-15h, heating to 400-class 450 ℃ at the speed of 40-60 ℃/h, preserving heat for 5-10h, cooling to 180-class 200 ℃ at the speed of 100-class 150 ℃/h, preserving heat for 4-6h, and finally air cooling to room temperature.
3. The production process of the aluminum alloy plate for the high-strength heat-conducting oil tank as recited in claim 1, wherein the thickness of the aluminum alloy ingot cast in the step (4) is 420-620 mm.
4. The production process of the high-strength heat-conducting oil tank aluminum alloy plate as claimed in claim 1, wherein the thickness of the aluminum alloy plate after hot rolling in the step (5) is 6-8 mm.
5. The production process of the high-strength heat-conducting oil tank aluminum alloy plate as claimed in claim 1, wherein the thickness of the cold-rolled aluminum coil after the cold rolling in the step (6) is 1.5-3.5 mm.
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